Best Password Manager
As you may have seen from some of the other posts here and from other news sources, there are major security issues with re-using the same password on more than one website.
The problem has been around for as long as the Internet has been in existence. How do you remember all of the different combinations of Username and Password.
For this I recommend a password manager called Lastpass. There are two versions available. The free version has all of the same features as the paid version except for the ability to synchronise the data between devices.
Lastpass is not only able to store your passwords but can also be used to generate really good passwords for you and inform you if it sees that you are using the same password on more that one site.
I am not affiliated to Lastpass in any way, nor do I get anything for recommending them. I am only writing this because, as a user and a computer technician, I believe the software and service to be the best there is at the moment.